Home / 3,107.12-4,287.69-1,780.74

Finding the Fourth Proportional to 3,107.12, 4,287.69 and 1,780.74

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Solution

The fourth proportional to 3,107.12, 4,287.69 and 1,780.74 is: 2,457.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.12 : 4,287.69 = 1,780.74 : x
  2. Step 2: Convert to fraction form
    3,107.12/4,287.69 = 1,780.74/x
  3. Step 3: Cross multiply
    3,107.12x = 4,287.69 × 1,780.74
  4. Step 4: Simplify right side
    3,107.12x = 7,635,261.09
  5. Step 5: Solve for x
    x = 7,635,261.09/3,107.12
  6. Step 6: Final answer
    x = 2,457.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.